If you want to fuck him : take them back stealthily and finger-fuck a messy cumload into each, then replace them exactly where you found them in his room.
If you don't want to fuck him : same procedure but instead of you pour anchovy brine in and leave in the sun, then replace them, again where you found them without him aware of your plot.
He'll know you know, and he'll know what you're thinking - either option promises for a Kodak moment expression when he sneaks a sniff - and THAT'S the look you gotta capture a pic of and post here for the Motherless of the world to see......good luck
When seeking the needle in a haystack, expect to encounter a lot of little pricks along the way.
